| South Portland to Fortuna (California) | 2,719.68 mi (4,376.90 km) |
| South Portland to Fortuna Foothills (Arizona) | 2,481.33 mi (3,993.31 km) |
| South Portland to Foster City (California) | 2,714.15 mi (4,368.00 km) |
| South Portland to Fostoria (Ohio) | 690.19 mi (1,110.76 km) |
| South Portland to Fountain (Colorado) | 1,807.95 mi (2,909.62 km) |
| South Portland to Fountain Hills (Arizona) | 2,315.61 mi (3,726.61 km) |
| South Portland to Fountain Inn (South Carolina) | 885.98 mi (1,425.84 km) |
| South Portland to Fountain Valley (California) | 2,622.61 mi (4,220.69 km) |
| South Portland to Fountainebleau (Florida) | 1,357.25 mi (2,184.28 km) |
| South Portland to Four Corners (Oregon) | 2,560.94 mi (4,121.43 km) |
| South Portland to Four Corners (Texas) | 1,694.22 mi (2,726.59 km) |
| South Portland to Four Square Mile (Colorado) | 1,793.56 mi (2,886.45 km) |
| South Portland to Fox Crossing (Wisconsin) | 904.10 mi (1,455.01 km) |
| South Portland to Fox Lake (Illinois) | 905.92 mi (1,457.94 km) |
| South Portland to Framingham (Massachusetts) | 108.23 mi (174.18 km) |
